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Chapter9 : Angular Momentum; General Rotation - Coggle Diagram
Chapter9 : Angular Momentum; General Rotation
Angular Momentum, L
Newton's 2nd Law
External torque absent,
L = constant
Therefore, if an object’s moment of
inertia changes, its angular speed
changes as well
Angular momentum is a
vector
for a
symmetrical object rotating about a
symmetry axis
it is in the
same
direction
as the
angular velocity vector
Torque as
a Vector
Right-hand rule
Cross Product
determinant form
=
+
+
Angular Momentum
of a Particle
General
Motion
The angular momentum
of a system of particles can
change only if there is
an external torque
This equation is valid in any
inertial reference frame, CM
Angular Momentum
& Torque for a
Rigid Object
Conservation of
Angular Momentum
Net torque =0
L
remains constant
